Question 750243
Multiply: 

{{{(n^3+8)(n-4)}}}

{{{n^3*n-4*n^3+8*n-4*8}}}

{{{n^4-4n^3+8n-32}}}




Subtract:

{{{ 5x^4 + 6x^3 -9x^2-(-6x^4+x^2)}}}

{{{ 5x^4 + 6x^3 -9x^2+6x^4-x^2}}}

{{{ (5x^4+6x^4) + 6x^3 -(9x^2+x^2)}}}

{{{ 11x^4 + 6x^3 -10x^2}}}